Recommended Books

[edit] C++ Books

The C++ Programming Language, Special Edition - The C++ manual from the original designer of C++, Bjarne Stroustrup. This edition is up to date with the ISO/ANSI C++ Standard.
Modern C++ Design: Generic Programming and Design Patterns Applied - How to do really amazing things with templates.
Effective C++: 50 Specific Ways to Improve Your Programs and Design - Tips on using C++.
More Effective C++: 35 New Ways to Improve Your Programs and Designs - Additional tips on using C++.
Design Patterns: Elements of Reusable Object-Oriented Software - A survey of popular design patterns and how to use them.
Exceptional C++ - C++ puzzles and solutions

Applied Cryptography: Protocols, Algorithms, and Source Code in C, 2nd Edition - A very good introduction to cryptography from a practical perspective.
Practical Cryptography - A hands-on implementation guide with detailed discussions of design decisions.
Cryptography Engineering: Design Principles and Practical Applications - Discussions of implementations details of modern crypto systems.
Handbook of Applied Cryptography - Excellent crypto reference book.
Handbook of Applied Cryptography (online) - All chapters of the latest edition are available online. Thanks, CRC Press!
A Course in Computational Algebraic Number Theory - Get this book if you are interested in learning about some of the number theory related algorithms in Crypto++.
Security Engineering - A treatment of designing and implementing secure systems.
The Art of Computer Programming : Seminumerical Algorithms - Volume 2 of Donald Knuth's classic series The Art of Computer Programming.

A Fire upon the Deep - Reading this book may have caused me to write Crypto++.
A Deepness in the Sky - The equally good prequel to A Fire upon the Deep.
True Names: And the Opening of the Cyberspace Frontier - This book contains the novella "True Names" by Vernor Vinge.
Cryptonomicon - An interwoven story about World War II code breaking and building a present-day data haven in the Philippines.
The Diamond Age - Neo-Victorian nanotech with crypto.